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Proceedings Paper

Novel high-speed 3-DOF linear direct drive operating with submicron precision
Author(s): Bernhard Sprenger; Roland Y. Siegwart
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Paper Abstract

Developments in microelectronics, micromechanics and microelectromechanical systems require significant improvements in manufacturing tools for mass productions. Especially the assembling tools have to become feaster and more precise. Many assembly devices use XY stages driven by DC servomotors with ball screws or parallel structures; others use linear drives with traditional ball bearings. Only a few devices use linear drives together with air bearings, but always together with an angular guide for X and Y direction. The novel approach present in this paper is based on linear drives together with a planar air bearing. In contrast to other stages, it does not need any angular guide. This reduces the moved mass and leads to higher accelerations. It consists of an arrangement of four identical moving-coils attached to a slide, which is suspended by a planar air bearing. This new configuration allows a workspace of 60 X 60 mm2 and an acceleration exceeding 10 g1 with a resolution better than 100 nm. This paper gives an overview of the system, describes the design of the moving coils and shows first experimental result of the controller.

Paper Details

Date Published: 1 January 1998
PDF: 8 pages
Proc. SPIE 3202, Microrobotics and Microsystem Fabrication, (1 January 1998); doi: 10.1117/12.298047
Show Author Affiliations
Bernhard Sprenger, Swiss Federal Institute of Technology/Zurich (Switzerland)
Roland Y. Siegwart, Swiss Federal Institute of Technology/Lausanne (Switzerland)


Published in SPIE Proceedings Vol. 3202:
Microrobotics and Microsystem Fabrication

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